Scaffold



Oct, 29, 1929. H CQPLAN 1,733,333

SCAFFOLD Filed Dec. l5, 192'?" :t: if@

:f www /Z la Patented Oct. 29, 1929 l l UNITED STATESPATENT OFFICEApplication led December 13, 1927. Serial No. 239,826.

This invention relates to'scaffolds, a strucside diameter of thestandards 8 is slightly ture employed around and inside of buildingsgreater than the outside diameter of the studs Jfor supporting workmenand structural or 14 so as to telescope upon said studs. Each othermaterials, so as to facilitate the workbody l isprovided with ahorizontally eX- Y 5 men perforimng various operations at diitertendingslot 16 to receive one end of one of '$5 ent levels. the cross members10. The cross members One of the objects of this invention is inare eachprovided with a gain 17 near each surance of safety to those using thescaffold. end so that when said cross members are Another object issimplicity, and the ease entered endwise into the slots 16 the gains 10with which the scaifold may be erected and may be caused to registerwith the bottom 6l) taken down. walls of the slots andthe cross membersthen Other objects and advantages will appear dropped to cause saidbottom walls to be rein the subjoined detailed description. ceived inthe slots. This prevents endwise The accompanying drawings illustratethe shifting of the cross members 10 when in invention: place. e5

Figure 1 is a plan view of a scaffold con- The scai'old` abovedescribed, is built up by structed in accordance with the provisionsplacing the required number of bases 7 in two of this invention, abuilding structure, ador more rows on the earth or other supportjacentto which the scaffold is positioned, being surface, telescoping uponeach of them ing indicated in broken lines. one of the standards 8 so asto provide a tier 70 Figure 2 is a front elevation of Figure 1. ofstandards, inserting one of the joint mem- Figure 3 is an enlargedfragmental view bers A9 in the upper end of each of the standof thescaii'old, partly in section. ards 8 that have been erected so as topro- Figure 4 is a plan View of Figure 3. vide a tier of such jointmembers, and con- Figureisaplan View, partly in section, of necting eachof the cross members 10 to a 'Z5 a modified joint construction. pair ofadjacent joint members 9 one of Figure 6 is an elevation, partly insection, which is in one row and the other in another on the lineindicated by 6-6, Figure 5. row so that each cross member 10 extends atFirst, referring to Figures 1 to 4 inclusive approximately a right'angle to the surface y of the drawings, the scaifold comprises any ofthe structure A that isto be built or worked 30 desired number of basemembers 7, standupon. Then other standards 8 will be tele? ards S, jointmembers or couplings 9, and scoped upon the joint members 9 to form across members 10. second tier of standards and within these Each base 7comprises a horizontally exlast mentioned standards still other jointtending flange 12 adapted to rest on the earth members will betelescoped to form a second 85 or other supporting surface, and eachbase tier of joint members. The joint members also comprises an upwardlyprojecting stud and standards will thus be assembled to form 13 which,if desired, for the sake of lightalternate tiers of standard and jointmemness may be tubular, as shown. The end bers to build up the scaffoldto the height de- 40 portions, at least, of the standards 8 are tusired.As soon as the joint members are in 9o -bular and, in this instance, thestandards for place the cross members 1() will be connected their entirelength are tubular. The inside therewith. The Hoor members, notshown,

diameter of the lower end of each standard 8 are placed upon the cross`members 10 in a is slightly greater than the outside vdiameter mannerwell understood in this art for sup- .'45 -o the Astud 13 so as totelescope upon said porting the workmen and materials. 95

' stud. It may be required by law, in some in- Each of. the jointmembers 9, in this instances, or it may be otherwise desirable tostance, is hollow, for the sake of lightness, brace the scaffoldlongitudinally and, accordand comprises end studs 14 projectingvertiingly, the coupling bodies 15 may be provided cally from anintermediate body 15. The inwithl horizontally projecting studs 18, said100 is provided with a head which holds the bolt against 'endvvisemovement in one direction. Brace members 21 are provided near their endswith holes 22 so as to engage over the studs 18. Eachy brace memberl 21connects adjacent diagonally opposite studs 18 longitudinally of thescaold, as clearly shown in Figure 2. The brace members 21 are preventedfrom sliding off of the studs 18 by Cotter pins 23, or theirequivalents, insei-ted through vertical holes 24 in the studs 18. Thesystem of brace members 21 may be used for the outer side only of thescaffold and the inner side of the scaffold may, if desired, be anchoredto the structure, along side of which the scaffold is placed. This isdone by providing fastening members 25, each of which forms a loop 26around one of the standards 8. Each fastening member 25 also comprises apair of legs 27 projecting from the loop 26. The member 25 is applied tothe standard by bending it around the same and the legs 27 are thensecured to one of the Window frames B, or other suitable member,

' of the structure A. In this instance, the legs 27 are secured in placeby nails 28.

A modification of the joint members is illustrated in Figures 5 and 6and the elements that correspond in function with those above describedare. indicated by the same reference character With the addition of theletter af In this instance, the slot 16 is omitted and the body 15a isprovided With a fork 29 and the opposite members of said forli areprovided With vertically alined holes 30 to receive a pin or bolt 31.r[he pin 31 may have a head 32 to prevent it dropping out of the holes30. `When this form of joint member is employed, the associated crossmember 10a is provided near each end With a hole 17a so that, when thecross member is inserted in the slot 16a of the fork 29, the pin 31 canbe inserted through the holes 30, 17 so as to secure the cross member tothe joint member.

I claim:

A scaffold comprising standards, joint members mounted on the standardsand provided with horizontally extending slots, and cross membersengaging in the slots and provided with gains to receive the bottomwalls of `the slots.

Signed at Los Angeles, California, this 2nd day of December, 1927.

RRY CPLAN.

